Introduction. S. Penman, B.J. Blencowe, and J.A. Nickerson, The Nuclear Matrix: Past and Present. Nuclear Matrix Structure and Function: R. Berezney, The Nuclear Matrix: Mapping Genomic Organization and Function in the Cell Nucleus. K.A. Mattern, R. van Driel, and L. de Jong, Composition and Structure of the Internal Nuclear Matrix. T. Kohwi-Shigematsu and Y. Kohwi, High Unwinding Capability of Matrix Attachment Regions and ATC-Sequence Context-Specific MAR-Binding Proteins. R.C. Bird, The Cyclin/Cyclin-Dependent Kinase Complex: Regulation of Cell Cycle Progression and Nuclear Disassembly. Chromatin Structure and Transcritpion Complexes: G.S. Stein, A.J. van Wijnen, J. Stein, J.B. Lian, and M. Montecino, Nuclear Architecture in Developmental Transcriptional Control of Cell Growth and Tissue-Specific Genes. D.G. Wansink, L. de Jong, and R. van Driel, Transcription by RNA Polymerase II and Nuclear Architecture. Nuclear mRNP Complexes: S.A. Amero and K.C. Sorensen, Protein Disposition on Nascent Pre-mRNA Transcripts. Chapter References. Subject Index.